Kirkegaardia neotesselata Blake, 2016, new species

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Ctenodrilidae; Kirkegaardia; Kirkegaardia neotesselata; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5612218; http://treatment.plazi.org/id/277D879E2E6D896105E1284CFC852BAF

Kirkegaardia neotesselata new species Figures 14, 15 A–C Tharyx annulosus : Maciolek et al. 1987: Appendix D-2 (In part, Sta. 11). Not Hartman (1965). Material examined . Western North Atlantic , Offshore New England, Georges Bank, continental slope south Cape Cod, US North Atlantic ACSAR Program, Cruse 2, R/V Oceanus , Sta. 11, Rep. 2, 0 4 May 1985, coll. G. Hampson, WHOI, Chief Scientist, 40°01.28′N, 70°55.09′W, 250 m, holotype and 7 paratypes (USNM 1407135– 6). Description. Holotype, complete, 10 mm long, 0.26 mm wide across thoracic segments for about 75 setigers; however an exact segment count not possible due to worms being enclosed in tube materials (Fig. 15 A–C). Body elongate, cylindrical throughout, with body segments wider than long in thoracic and anterior abdominal segments, becoming longer posteriorly, with some appearing oval or moniliform in shape; segments becoming narrow and crowded in far posterior segments forming an expanded posterior end terminating in a simple pygidium with terminal anus and single ventral lobe (Fig. 14 B). Pre-setigerous area somewhat bullet-shaped, 1.5x as long as wide; prostomium short, triangular, and narrowing to a pointed tip (Fig. 14 A); nuchal organs at posterior-lateral margin; eyes absent. Peristomium with three lateral grooves producing up to four annular rings only apparent laterally (Fig. 14 A); dorsum elevated, with mid-dorsal ridge along most of peristomium, continuing along mid-dorsal thoracic groove (Fig. 14 A). Peristomium ending at anterior border of setiger 1, with demarcation clearly evident; dorsal tentacles arising from posterior margin (Fig. 14 A). First pair of branchiae on setiger 1, dorsal to notosetae (Fig. 14 A). Thoracic region with about 10 setigers, but overall nature of anterior end obscured on several specimens due to tightly adhering tube material; channel between parapodia with a narrow mid-dorsal ridge present, continuing from peristomium and extending for 6–7 setigers, then merging with mid-dorsum and disappearing (Fig. 14 A). ...